Locking angle cock



LocKINGfANGLg cdcx I Dec. 18, 1934.

Filed ne s/9 1955 I 2 Sheets-Sheet 1 x INVENTOR CLYDE 'c. FAHMEH Ano v.BY

Dec. 18, 1934.

c. c. FARMER LOCKING ANGLE COCK 2 Sheds-Sheet 2 Filed Dec. 9, 1953 INVENTOR CLYDE C. FAHMEF! Qfi/W ATTQRN Patented Dec. 18, 1934 Q I, v t v i 1 UNITED: (ST TES; PATENT OFFICE- I 1,984,870

The Westinghouse Air Brake Company, Wilmcrding, Pa., a corporation of Pennsylvania sp i tien December 9, 1933, Serial .No. 701,649

11 Claims. (or. 70-12; v

This invention relates to locking cock devices medium of the usual valve stem 2- which is roand more particularly to a locking angle'cock of tatably mounted in. the cock :body' and further the-type employed in railway service for concomprises an operating handle 3; trolling communication, at each end of. a car, The. handle 3 ispivoted, by means of a pin 4, to

5 fromthe brake pipeonthe car to the brake pipe a valve stemoperating member 5 which is secured of a connected car. v t to the valve stem... The member 5 is provided Ithas sometimeshappened that an angle cock with a lug. 6 adapted to engage stops 7 andv 8 in in the train brake pipe has been. closed by an unthe. cock body when the valve. stem is. turnedto its authorized person or has been negligently closed, respective valve open and valve closed positions.

so that the engineer loses control of the brakes The handleis provided'w-ith lugs 9 and 10, the 10 on the cars at the rear of the closed angle cock. lug 9 being adapted to. engage the stop 8 when When. a. train is made up the angle cock. at the the handle is in the valve open position, :and the rear end of the rear car of the train and the lug 10 being adapted-to engage the stop '7' when anglecock at the head end of the locomotive are the handle is in. the valve'cl'osedflpositionr both closed and if either of these angle cocks is The member 5', which is secured to the valve 9? opened. the engineer loses control of the brakes on stem, is provided with spaced upwardly extendthe train. ing lugs 11, between which there" is disposed a Under either of these conditions, serious aclocking. latch or bolt 12 which is rockably mountcidents are liable to happen, as the engineer caned, intermediate its end's; on a 'pin 13- extending not properly control'the brakes. between andcarried by the lugs 11. The end 14 0 The principal object of the invention is to ob- O th locking belt i a b e Oh the p I viate the above difiiculty by providing an imper surface of the member 5 and is subject to the proved locking cock which may belocked in en action of spring 15 which at all times tends to ther the open or closed position of the cock and force the end 14 ofv the locking bolt. to its posiwhich can only be opened bya key which a traintion of rest on the member 5, the inner endporman keeps in his possession. tions of the springv being. mountedon thepin. 4'

Under. some, conditi n of. ervi e it may be and anchored against rotation by lugs 16' on the desirable to maintain the cock unlocked so that it member 5. With the end 14 of thelocking' bolt may readily be moved to its open and closed poatlrest on the member 5, the Ot 7,.0f the sition without having to resort to the use of. a key, locking b t d to the path of travel of a .30

' andanother object of the invention to. provide his Carried y the handle Where i is p d a locking cock which can be looked in its open to engage with the lug 18 to prevent the'handle or its closed position only upon the application from being raised a sufficient distance. tojeffect of manual pressure to-the handlethereof. th en g m nt 0 the lug 9. from the stop 8, so

Other objects. and advantages will appear in that thehandle and parts operatively associated -35 the following more detailed description of the therew Ca e moved to their valve open invention. position. r

In the accompanying drawin Fig 1 i a id The lug 18 is provided with a notch'19 which is view, partly in section, of a portion of a locking, adapted to accommodate the lug 6 of the member 40 cock embodying my invention, with the handle of 5 'whenthe handle is in its valve open position 4:

the cock locked in the cock open position; Fig. 2 asshownin'Fig; 1. is a similar view illustratingthe manner ofjun- The inner end of the handle 3 is made 'in the locking the-handlegof the cock? Fig. 3 is a Similar form of a hood which encloses the locking bolt view with the handle of the, cock unlocked; Fig. 12, and has mounted in one of thesidewalls'of 4 is a perspective viewof a key unlocking the the hooded portion an escutcheon 2ozhaving a handle locking means; Figs. 5 and 6 are horikey opening 21 which is shaped to permit the inzontal sectional views on the lines 5- -5 and (S -6, sertion of a peculiarlyshaped bolt operating cam respectively, of Fig. 1; and Fig. '7 is a fragmen- 22. having an operating shank 23 through the ta'ry'end elevational view, partly in section, of mediumof which the cam is adaptedto'be rotated.

5 the cock device, the sectional portion of the view Mounted. on the. pin 13 and straddling thelocksaidvphlg Valve being operatedthrough the in a counterclockwise direction relative to the pin beingon theline 7-7 of Fig. 1. ing bolt 12 is a torsion spring 24 having its ends As shown in the drawings, the angle cock.deabutting spaced'lugs 25 formed in the locking vice may-comprise the cock body linwhich'the bolt 12 at a point to the left of pivot pin 13, the usual plug valve (not shownlis rotatably mountlugs preventingrotation of the ends ofthe spring when the locking bolt is in its locking position as shown in Figs. 1 and 3. The central portion of the spring extends upwardly on the right hand side of the pin 13 and is provided with a roller 26 which is adapted to engage with the interior surface of a wall 27 of the hooded portion of the handle as shown in Figs. 2 and 3 for the purpose of urging the handle toward its lower or locked position.

Assuming the angle cock device to be locked in its closed position as shown in Figs. 1, 5, 6 and 7 and it is desired to open it, the trainman inserts the cam portion 22 of the key into the handle through the key opening 21 in the escutcheon 20. When the key is thus positioned, the trainman lifts the handle 3 and at the same time rotates the cam portion 22 in a clockwise direction causing the cam to engage the end 1'7 of the locking bolt 12 after which the cam, as its rotation'is continued, causes the locking bolt to rock forwardly to a position out of the path of travel of the lug 18 of the handle as shown in Fig. 2. As the handle is being raised from the position in which it is shown in Fig. 2 the key is rotated still further so as to maintain the locking bolt in the position shown, thus permitting the upper edge of the lug 18 to pass the upper edge of the end of the locking bolt, and further upward movement of the handle causes the lug 18 to pass above the end 17 of the locking bolt as shown in Fig. 3. As the locking bolt is being rocked to its unlocking position with relation to the handle 3 as just described the interior surface of the wall 27 of the handle engages the roller 26 on the spring 24 so that as the handle is raised the spring is torsioned. When the lug 18 passes above the end 17 of the locking bolt both springs, 15 and 24, act to tilt the locking bolt rearwardly to the position in which it is shown in Fig. 3. It will be noted that with the handle 3 raised as shown in Fig. 3, the lug 9 is out of locking engagement with the stop 8 so that the handle can now be moved to its valve closed position.

In operation the handle 3 may be lifted far enough that the lug 18 is out of engagement with the end 17 of the locking bolt, and when this is the case, the spring 24 acts to assist in moving the handle downwardly to the position in which the lug l8 rests on the end of the locking bolt. It will here be understood that the handle 3, when the operator releases his hold thereon, will move downwardly into engagement with the end 17 of the locking bolt. The springs 15 and 24 acting on the locking bolt 12 prevent the handle from rocking the locking bolt forwardly, so that the handle will be held raised in an unlocked position. If it should be desired to lock the angle cock device in its unlocked position, the operator forces the handle downwardly causing the locking bolt 12 to rock forwardly to permit the lug 18 to pass below the end 17 of the locking bolt 12. As the upper surface of the lug 18 passes the upper surface of the end 17 of the locking bolt the spring 15 acts to rock the bolt rearwardly which positions the end 17 of the bolt in the path of travel of the lug 18 where it is adapted to engage the lug 18 and prevent the handle from being raised high enough to disengage the lug 10 from the stop 7, the lug 10 having been moved into locking engagement with the stop '7 when the handle was depressed by the trainman.

Once the handle 3 has been locked in the valve closed position the trainman must use the key to unlock it, the unlocking operations being the same as described in connection with the unlocking of the handle in the valve open position.

When the handle is moved from its valve closed position to its valve open position the locking bolt 12 will support the handle in its unlocked position until depressed by the trainman and when depressed the locking bolt will act to lock the handle in its valve open position in the same manner as when the handle is depressed in the valve closed position.

It will be understood that the above described construction may be locked in either a valve open position or a valve closed position against movement except by a person provided with the proper key, and it is intended that the trainman shall keep possession of the key and be held responsible for the same. This construction also provides for the maintaining of the handle unlocked in either the valve open or valve closed position until manually depressed by the trainman.

While one illustrative embodiment of the in vention has been described in detail, it is not my intention to limit its scope to that embodiment or otherwise than by the terms of the appended claims.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of locking means adapted to engage said handle to prevent the handle from being moved out of locking engagement with said stop and being adapted to be moved to a position for per mitting the handle to be moved out of looking engagement with the stop, said locking means be ing adapted to support said handle in the last mentioned position until the handle is manually depressed.

2. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of locking means adapted to engage said handle to prevent the handle from being moved out of locking engagement with said stop and being adapted to be moved to a position for permitting the handle to be moved out of locking engagement with the stop, said locking means being adapted to engage said handle in the last mentioned position, and means associated with the locking means for conditioning the locking means to support the handle in the last menopposite direction into locking engagement with the stop, of a pivoted member adapted to engage dle is moved out of locking engagement with said Stop 1H '4."The c ombination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of a pivoted member adapted to engage the handle to prevent the handle from being moved out of locking engagement with said stop and being rockable to a position out of locking relation with the handle, said pivoted member being automatically movable to a position for supporting said handle when the handle is lifted out of locking engagement with said stop.

5. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of a pivoted member adapted to engage the handle to prevent the handle from being moved out of locking engagement with said stop and being rockable to a position out of locking relation with the handle, said pivoted member being automatically movable to a position for supporting said handle when the handle is lifted out of locking engagement with said stop and automatically movable into locking position with relation to the handle upon the depression of the handle from its supported position.

6. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of a pivoted member adapted to engage the handle to prevent the handle from being moved out of locking engagement with said stop and being rockable to a position out of locking relation with the handle, said pivoted member being automatically movable to a position for supporting said handle when the handle is lifted out of locking engagement with said stop and movable out of its handle supporting position and into its handle locking position upon the manual depression of the handle from its supported position.

'7. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the op posite direction into locking engagement with the stop, of locking means adapted to engage said handle to prevent the handle from being moved out of locking engagement with said stop and suen for.rocki rigythe pivotedrmember into. supporting position with respect 'to'th'e handlerwhen thehan- 1e: to, a position at. permitting the edout 101, lo n en age top; ,m a yiel'dably,resisting; movehe lockingg'meansjto thelast m'entioned posit tion .forjsupportingsaid handle upon movement of the. handled-out. oi locking engagementwith 1 3 .1 t n, andmeans. .fqrmbvin the handle into engagement with the locking means when, after the handle has been moved out of locking engagement with said stop, the handle is released by an operator.

8. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of locking means adapted to engage said handle to prevent the handle from being moved out of locking engagement with said stop and being movable to a position for permitting the handle to be moved out of locking engagement with the stop, said locking means being movable to position for supporting the handle out of locking engagement with said stop, and means tending to move the handle into engagement with the locking means after the handle has been moved out of locking engagement with said stop.

9. The combination with a cock device having a rotatable valve stem, a handle for rotating the valve stem and a stop adapted to be engaged by the handle to lock the handle against movement to rotate the valve stem, said handle being movable vertically in one direction out of locking engagement with the stop and movable in the opposite direction into locking engagement with the stop, of locking means adapted to engage said handle to prevent the handle from being moved out of locking engagement with said stop and handle to be moved out of locking engagement with the stop, said locking means beingmovable to position for supporting the handle out oilocking engagement with said stop, and a spring cooperating with said locking means andsaid handle for moving the handle into engagement with the locking means when after being moved out of locking engagement with said stop the handle is released by an operator.

10. The combination with a cock device having a rotatable valve stem, a member for rotating the valve stem, a stop, and a handle for rotating said member, said handle being pivotally mounted on said member and adapted to be moved pivotally downwardly into engagement with said fblffmfovinlgl the locking means into. posistop to prevent the rotation of the member and adapted to be moved pivotally upwardly out of engagement with the stop to permit the rotation of the member, of a bolt mounted on said member adapted to prevent the handle from being moved upwardly out of locking engagement with said stop and movable to a position for permitting the handle to be moved upwardly out of engagement with the stop and also being movable to a position to engage and support said handle upon movement of the handle out of engagement with said stop.

11. The combination with a cock device having a rotatable valve stem, a member for rotating the valve stem, a stop, and a handle for rotating said member, said handle being pivotally mounted on said member and adapted to be moved pivotally downwardly into engagement with said stop to prevent the rotation of the member and adapted to be 'moved pivotally upwardly out of engagement with the stop to permit the rotation of the member, of a locking bolt mounted. on said member adapted to prevent the handle from being moved upwardly out of locking engagement with said stop and movable to a position for permitting the handle to be moved upwardly out of engagement with the stop and also being movable to a position to engage and support said handle upon movement of the handle'out of engage- CLYDE C. FARMER. 

